head loss

plural head losses

1. countableuncountableThe pressure lost in a hydraulic system as fluid moves through a pipeline.

   The total head loss is the sum of the head losses of all of the component pipes.

   2000, Frank R. Spellman, The Science of Water, →ISBN, page 74

   2 more examples

   Determination of minor head loss is simple and straightforward, and a standared nomograph in common use is included at the end of the chapter.

   1995, Barbara Hauser, Practical Hydraulics Handbook, Second Edition, →ISBN, page 71

   A butterfly valve, like any restriction in a pipeline, is a source of head loss.

   2001, American Water Works Association, Butterfly Valves - Torque, Head Loss, and Cavitation, →ISBN, page 55

2. countableidiomaticinformaluncountablehobbiesA loss of self-control leading to poor conduct.

   Fulham will have time to assess their head loss and learn from it over the international break.

   2023 March 20, Mitchell Wilks, “Aleksandar Mitrovic charged with ‘violent and improper conduct’ by FA over Man Utd incident as Marco Silva and Fulham also penalised”, in Goal.com